Deneb, one of the most luminous stars as viewed from Earth, has a solar mass of 20 and solar radii of 250Which of the following accurately describes the star Deneb?Deneb is 250 times farther away than the Sun.Deneb has 250 times the mass of the Sun.Deneb is 20 times the mass of the Sun.Deneb has 20 times the volume of the Sun.

Our Sun is one star among billions of stars in the Milky Way. However, it is difficult to determinethe exact number of stars. By observing the nearby stars around us, you find that the local den-sity of stars is 0.05 stars/(light-year)3. For simplicity, assume that the Milky Way has a cylindricalshape with a diameter of 100,000 light-years and a thickness of 1,000 light-years.Use this information to estimate the total number of stars in the Milky Way

The largest known star in the universe is*1 pointThe SunBetelgeuseStephenson 2-18Mu Cephei

The mass of Earth is approximately 6 000 000 000 000 000 000 000 000 kg. Given that the mass of theSun is 330 000 times the mass of Earth, find the mass of the Sun. Express your answer using scientificnotation correct to three significant figures.

Which star type has a surface temperature of 4000 K and a luminosity 1000 times greater than the Sun?

What is the luminosity of our Sun?312